Method and device for slowing down same-frequency interference between NGSO communication constellations based on interference alignment

A technology of interference alignment and co-frequency interference, which is applied in the field of wireless satellite communication, can solve problems such as unsatisfactory mitigation effects, and achieve the effect of spectrum coexistence

Active Publication Date: 2021-08-13
UNIV OF SCI & TECH BEIJING
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] The present invention provides a method and device for mitigating co-channel interference between NGSO communication constellations based on interference alignment, using the precoding technology in interference alignment and the minimum mean square error detection (Minimum Mean Square Error, MMSE) algorithm for equalizing noise To jointly solve the problem of co-channel interference between NGSO communication constellations; to solve the technical problem that the existing signal-level segmentation technology is not ideal for mitigating co-channel interference between NGSO communication constellations in the scenario where NGSO communication constellations coexist

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  • Method and device for slowing down same-frequency interference between NGSO communication constellations based on interference alignment
  • Method and device for slowing down same-frequency interference between NGSO communication constellations based on interference alignment
  • Method and device for slowing down same-frequency interference between NGSO communication constellations based on interference alignment

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no. 1 example

[0032] This embodiment aims to propose an interference mitigation method for spectrum coexistence among NGSO communication constellations based on the interference alignment method in multi-cell communication. The purpose is to propose a method for mitigating co-channel interference in the NGSO communication constellation spectrum coexistence scenario from the perspective of signal segmentation. By introducing the interference alignment technology in the multi-cell of the cellular network, it provides a NGSO communication constellation based on interference alignment to mitigate co-channel interference. Methods.

[0033] The method provided in this embodiment uses the interference alignment technology in multiple cells of the terrestrial cellular network to solve the same-frequency interference problem between NGSO communication constellations. Among them, interference alignment is an effective method to eliminate signal interference. The precoding technology is used to proces...

no. 2 example

[0083] This embodiment provides a device for mitigating co-channel interference between NGSO communication constellations based on interference alignment. The device for mitigating co-channel interference between NGSO communication constellations based on interference alignment includes the following modules:

[0084] The precoding module at the transmitting end is used to use the interference alignment technology in the multi-cell of the terrestrial cellular network to perform precoding design on the transmitting signal at the transmitting end, so that the interference signal overlaps at the receiving end, compresses the space of the interference signal, and makes the target signal and the interference signal It is separated at the receiving end and received in different signal spaces in order to recover the target signal;

[0085] The noise power control module at the receiving end is used to detect the MMSE algorithm through the minimum mean square error at the receiving end...

no. 3 example

[0088] This embodiment provides an electronic device, which includes a processor and a memory; at least one instruction is stored in the memory, and the instruction is loaded and executed by the processor, so as to implement the method of the first embodiment.

[0089] The electronic device may have relatively large differences due to different configurations or performances, and may include one or more processors (central processing units, CPU) and one or more memories, wherein at least one instruction is stored in the memory, so The above instruction is loaded by the processor and executes the above method.

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Abstract

The invention discloses a method and a device for slowing down same frequency interference between NGSO communication constellations based on interference alignment. Interference signals are overlapped at a receiving end by pre-coding a transmitting end, the space of the interference signals is compressed, a target signal and the interference signals are separated at the receiving end, and the target signal and the interference signals are received in different signal spaces; therefore, effective recovery of the target signal is realized. The receiving end processes through an MMSE algorithm to solve the problem of overlarge noise power caused by interference mitigation. According to the invention, the problem of same-frequency interference in an interference scene between NGSO communication constellations is converted into the problem of feature signal extraction. Signals are processed in a signal space through a signal transformation mechanism, so that an interference part is aligned to a compressed signal subspace, a target signal can be transmitted in a subspace orthogonal to the target signal, and the spatial freedom degree of the target signal is increased. Finally, spectrum coexistence between NGSO constellations is realized.

Description

technical field [0001] The present invention relates to the technical field of wireless satellite communication, and in particular to a method for mitigating co-frequency interference between NGSO communication constellations based on interference alignment, which is mainly used in the scenario where non-geostationary satellite orbit (Non-Geostationary Satellite Orbit, NGSO) communication constellations coexist and devices. Background technique [0002] In recent years, satellite communication has developed rapidly. Compared with the geostationary Earth Orbit Satellite (GSO) communication system, the NGSO communication system has less link propagation loss and lower transmission delay. Through multiple NGSO satellites, it can Achieving global seamless coverage (including the two poles) has become a hot spot in the development of satellite communications. However, satellite frequency resources are limited, and the International Telecommunication Union (ITU) implements the pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/185H04B7/0456H04J11/00
CPCH04B7/18519H04J11/005H04B7/0456Y02D30/70
Inventor 张海君李家旺刘向南李伟杜冰
Owner UNIV OF SCI & TECH BEIJING
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